MPC8572ECLPXATLD datasheet(87/140 Pages) FREESCALE

87 / 140 page

MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

PCI Express

TRX-EYE-MEDIAN-to-MAX

-JITTER

Maximum time

between the jitter

median and

maximum

deviation from

the median.

—

0.3

Jitter is defined as the measurement

variation of the crossing points (VRX-DIFFp-p

= 0 V) in relation to a recovered TX UI. A

recovered TX UI is calculated over 3500

consecutive unit intervals of sample data.

Jitter is measured using all edges of the

250 consecutive UI in the center of the 3500

UI used for calculating the TX UI. See

Notes 2, 3 and 7.

VRX-CM-ACp

AC Peak

Common Mode

Input Voltage

——

150

VRX-CM-ACp = |VRXD+ +VRXD-|/2 -

VRX-CM-DC

VRX-CM-DC = DC(avg) of |VRX-D+ + VRX-D-|/2

See Note 2

RLRX-DIFF

Differential

Return Loss

—

Measured over 50 MHz to 1.25 GHz with

the D+ and D- lines biased at +300 mV and

-300 mV, respectively.

See Note 4

RLRX-CM

Common Mode

Return Loss

—

Measured over 50 MHz to 1.25 GHz with

the D+ and D- lines biased at 0 V. See Note

ZRX-DIFF-DC

DC Differential

Input Impedance

100

120

RX DC Differential mode impedance. See

Note 5

ZRX-DC

DC Input

Impedance

Required RX D+ as well as D- DC

Impedance (50 ± 20% tolerance). See

Notes 2 and 5.

ZRX-HIGH-IMP-DC

Powered Down

DC Input

Impedance

200 k

—

Required RX D+ as well as D- DC

Impedance when the Receiver terminations

do not have power. See Note 6.

VRX-IDLE-DET-DIFFp-p

Electrical Idle

Detect Threshold

—

175

VRX-IDLE-DET-DIFFp-p = 2*|VRX-D+ -VRX-D-|

Measured at the package pins of the

Receiver

TRX-IDLE-DET-DIFF-

ENTERTIME

Unexpected

Electrical Idle

Enter Detect

Threshold

Integration Time

—

An unexpected Electrical Idle (VRX-DIFFp-p <

VRX-IDLE-DET-DIFFp-p) must be recognized

no longer than TRX-IDLE-DET-DIFF-ENTERING

to signal an unexpected idle condition.

Table 62. Differential Receiver (RX) Input Specifications (continued)

Symbol

Parameter

Min

Nominal

Max

Units

Comments

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